mermaid-waters postcode qld Home ›› Postcode Finder ›› QLD ›› Mermaid-Waters Mermaid Waters local listingsThe suburb of Mermaid Waters is located in QLD and has a postcode of 4218. Free mermaid waters business listing! Get the first free listing in mermaid waters! Search and find other Postcodes in Queensland or widen the search to Postcodes in Australia.